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Which steering system dispenses with a mechanical connection to the road wheels?

  • A.Active steering
  • B.Electrohydraulic steering, in which an electric motor drives the pump and the hydraulic fluid transmits the movement
  • C.Steer by wire
  • D.Electric power steering, whose motor drives the rack and therefore replaces the mechanical connection entirely

Answer: C

Steer by wire replaces the column with sensors, actuators and a feedback motor, and requires redundancy throughout because a failure has no mechanical fallback. Electric power steering retains the mechanical path. Regulatory approval has been the main obstacle. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The order in which the effects act is what decides the outcome, so it is worth establishing first.

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